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A simple chart for classifying the main star types using Harvard classification In astronomy , stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors ...
In astronomy, the color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. The lower the color index, the more blue (or hotter) the object is. Conversely, the larger the color index, the more red (or cooler) the object is.
Download as PDF; Printable version; ... Temperature: 31,400 ... (circled), as shown in a conventional star chart with north up.
Temperature description: T eff - Temperature Effect, usually associated with luminous object; T max - Temperature Maximum, usually associated with non-luminous object; T avg - Temperature Average, usually associated with non-luminous object; T min - Temperature Minimum, usually associated with non-luminous object; K - Kelvin
Betelgeuse is a red supergiant star in the constellation of Orion. It is usually the tenth-brightest star in the night sky and, after Rigel, the second-brightest in its constellation. It is a distinctly reddish, semiregular variable star whose apparent magnitude, varying between +0.0 and +1.6, has the widest range displayed by any first ...
A B-type main-sequence star (B V) is a main-sequence (hydrogen-burning) star of spectral type B and luminosity class V. These stars have from 2 to 16 times the mass of the Sun and surface temperatures between 10,000 and 30,000 K. [1] B-type stars are extremely luminous and blue.
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It therefore resembles what the Sun might look like were humans to observe it from Eta Cassiopeiae. The star has 97% of the mass of the Sun and 100% of the Sun's radius. [11] It is of apparent magnitude 3.44, [2] radiating 129% [3] of the luminosity of the Sun from its outer envelope at an effective temperature of 6,010 K. [11]